CN101109442A - Hydraulic system for an electro-mechanical transmission and method of providing fluid to transmission components - Google Patents
Hydraulic system for an electro-mechanical transmission and method of providing fluid to transmission components Download PDFInfo
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- CN101109442A CN101109442A CNA2007101369530A CN200710136953A CN101109442A CN 101109442 A CN101109442 A CN 101109442A CN A2007101369530 A CNA2007101369530 A CN A2007101369530A CN 200710136953 A CN200710136953 A CN 200710136953A CN 101109442 A CN101109442 A CN 101109442A
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- main pump
- transmission components
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H61/0025—Supply of control fluid; Pumps therefore
- F16H61/0031—Supply of control fluid; Pumps therefore using auxiliary pumps, e.g. pump driven by a different power source than the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- General Details Of Gearings (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
A hydraulic system for an electro-mechanical transmission includes an electrically-powered main pump, a battery powered auxiliary pump and an output pump. The main pump provides fluid to transmission components such as a torque-transmitting mechanism. The auxiliary pump provides fluid pressure to engage the torque-transmitting mechanism when electric power to the main pump is unavailable or the main pump is otherwise inoperable. The engaged torque-transmitting mechanism enables rotation of an output member which mechanically powers the output pump so that it may provide fluid to the transmission components in lieu of the main pump. A method of providing fluid to transmission components is also provided.
Description
Technical field
The present invention relates to be particularly useful for the hydraulic system of the electro-mechanical transmission on the endless-track vehicle, wherein said hydraulic system is driven by the electric power input at least in part.
Background technique
Transmission for vehicles generally includes hydraulic system, and this hydraulic system provides cooling and lubricated to transmission components, but and supercharging torque drive mechanism so that speed changer can gear shift and vehicle can brake.Be typically provided with electronic control unit with control fluid stream, hydraulic system general using pump and various valve are need guide fluid in response to vehicle operating.
Electric caterpillar band vehicle one or more electric propulsions of (for example tank) general using and steer motor independently utilize the electric wheel motor to control track speed in the crawler belt place by machine power path (for example, axle and gear) or at each.Motor can be driven by the power source that energy is provided to generator (for example internal-combustion engine or diesel engine), and generator stores the energy in the battery subsequently with drive motor.
Summary of the invention
Because the electric caterpillar band vehicle have can be electric the power that uses of form, so a kind of electronic transmission fluid pressing system need be provided.But when electric power breaks down, need guarantee that hydraulic pressure can suitably control crucial vehicle functions, as braking with turn to, and guarantee to provide cooling and lubricated.Therefore, the invention provides a kind of electro-mechanical transmission hydraulic system with electronic main pump, the stand by pump function that is provided by battery-driven service pump and Mechanical Driven rear pump in power failure is provided described electronic main pump.Particularly, described electronic main pump provides fluid to the transmission components that comprises at least one torque-transmitting mechanisms, and preferably, the described transmission components common transmission oil loop, steer motor and the drive motor that comprise break, hold first and second out-put containers of the fluid that is used to cool off described break and be used for lubricated transmission gear and bearing.
Described hydraulic system also comprises battery-driven service pump, and when the electric power of supplying with described main pump can't use, described battery-operated service pump can be operated selectively, engages one of described torque-transmitting mechanisms so that enough hydrodynamic pressures to be provided.The joint of described torque-transmitting mechanisms is operably connected to described drive motor on the speed changer output element, thereby the ability that makes described speed changer output element rotation is provided.Rear pump is operably connected on the described speed changer output element, and drive by the rotating machinery ground of described output element, provide fluid so that when electric power breaks down, substitute described main pump to described transmission components, be used for cooling and lubricated break between period of traction.When described main pump broke down owing to other reason, described service pump and rear pump provided this reserve function also can for described main pump.
Preferably, described main pump is the multistage centrifugal pump with the structure (pump case that for example has rotatable impeller) that forms a plurality of runners.Described main pump may command is to provide four levels that comprise cooling class, high pressure stage and the first and second backflow levels.In described cooling class, the hydrodynamic pressure that described main pump provides is first (higher) flow and first (lower) pressure.In described high pressure stage, the hydrodynamic pressure that described main pump provides is for less than second flow of described first flow with greater than second pressure of described first pressure.Described cooling class provides common lubricated can for described oil circuit, and described high pressure stage can engage the torque-transmitting mechanisms in the described speed changer.In the described first backflow level, described main pump operation is back to storage tank with the fluid with described first out-put container.Similarly, in the described second backflow level, the fluid of described second out-put container is back to described storage tank.Therefore, when fluid needn't cool off break at described out-put container place (for example, when not using described break), make the spin loss minimum relevant with fluid by fluid being returned described storage tank.
When main pump fault or power loss took place, described service pump may command provided hydrodynamic pressure so that stop to described torque-transmitting mechanisms when described output element reaches predetermined speed.Therefore, the joint that is enough to the service pump by described torque-transmitting mechanisms when vehicle starts when making that it reaches predetermined speed, and described rear pump replaces the function that hydrodynamic pressure is provided to described transmission components.
The motor-drive pump controller is operably connected to described main pump, needing conditions such as (comprise and engage the described necessary flow of transfer mechanism of turning round) and hydrodynamic pressure based on the temperature of the speed (it can be associated with car speed) of for example described output element, one or more described transmission components, predetermined amount of flow in the described hydraulic system, with the Spin Control of described main pump in variable speed.By changing the speed of described pump based on system's operating conditions, make relevant energy loss minimum when moving to be higher than necessary speed with described pump.
Because described rear pump is mechanically driven by described output element, if (suppose that described vehicle track contacts with ground so described output element is connected to one of described vehicle track, feasible traction makes described crawler belt rotation), so described output element can rotate during draw operations.Therefore, when vehicle was pulled, described rear pump can provide cooling fluid and lubricant oil to described transmission components.
Preferably, described hydraulic system is used and can be operated so that with the multiple valve of optimum way guiding fluid, to satisfy cooling and lubricated needs.For example, between described main pump and described transmission components at least one safety check is set preferably, it can be operated with during for example described cooling class or described high pressure stage, allows fluid to be transported to described parts from described pump.But when electric power can't use, described safety check prevented to flow back into described main pump at the fluid of described transmission components.That is to say that during power failure, described safety check prevents that discharge and the system pressure do not expected from losing.Between described rear pump and described transmission components, can use similar safety check, to prevent from when not using rear pump, to pass through the discharge of this rear pump.
Also pressure equalizing valve can be set, be specifically used for the operation during the power failure, when the electric power of supplying with described main pump can't use, allow one of described first and second out-put containers to be communicated with fluid between the described storage tank.Therefore, described pressure equalizing valve has backed up the function of the described level that refluxes of described main pump, and main pump is unavailable during described power failure.
The break coolant valve can be set, when using described break, described break coolant valve can be operated, and is communicated with fluid between the described break to allow described rear pump, so that the described break of cooling during the brake application when heating value is in highest level.In addition, the rear pump bypass valve can be set, when not using described break, described rear pump bypass valve can be operated, and flows to described storage tank to allow fluid from described rear pump.Therefore, minimum by the fluid that described break place is existed when need not appropriate braking function, lubricated or cooling, make and provide fluid relevant spin loss minimum at described break place.When using described rear pump during power failure, described rear pump bypass valve can be used as pressure regulator valve.For example, described rear pump bypass valve can be configured to allow fluid to flow to described storage tank (for example, when the hydrodynamic pressure in those stream pipes surpasses predetermined pressure, flowing to described storage tank from the runner that is connected with the high pressure stage fluid of described main pump) in predetermined pressure.
A kind ofly provide the method for fluid, comprise to first (master) pump FLUID TRANSPORTATION electric power is provided that the first pump may command is to provide fluid to the described transmission components that comprises described torque-transmitting mechanisms to transmission components.If it is unavailable to supply with the electric power of described main pump, perhaps described main pump is owing to other reason can't turn round, so described method comprises to second (assisting) pump carries the power of battery, make described service pump provide fluid to described torque-transmitting mechanisms, thereby the engage torque transfer mechanism can rotate the speed changer output element that is mechanically connected to described torque-transmitting mechanisms.The output element of described rotation mechanically drives (for example, by chain or other connection set) the 3rd (output) pump, makes described rear pump provide fluid to described transmission components.Therefore, occur at described first pump under the situation of fault (owing to power loss or other reason), described rear pump is as redundant stand by pump.
In case described engaged torque-transmitting mechanism makes described speed changer to start, and described rear pump provides fluid can for described transmission components, so described method comprise termination to described second pump carry the power of battery this can be when the rotation of described output element be characterized as predetermined speed the time (, represent the successful starting and the speed of rear pump operability).
In conjunction with the accompanying drawings, to realizing the detailed description of optimal mode of the present invention, can understand above-mentioned feature and advantage of the present invention and further feature and advantage from following easily.
Description of drawings
Fig. 1 is the schematic representation of hydraulic system of electro-mechanical transmission that comprises the endless-track vehicle of multistage main pump, service pump and rear pump;
Fig. 2 is the side-looking partial section that comprises the pump assembly of the main pump of Fig. 1 and electronic control module;
Fig. 3 is the schematic representation that the electric power of the main pump assembly of Fig. 2 is imported.
Embodiment
Hydraulic system
With reference to the accompanying drawings, wherein identical reference character refers to identical parts, Fig. 1 shows hydraulic system 10 lubricated and cooling to the various transmission components on the endless-track vehicle 11 that comprises electric drive motor 12, electric powered steering motor 14 and speed changer lubricating loop 16 is provided, wherein said speed changer lubricating loop 16 comprises passage, pipe-line system or any structure known in the art that is formed in the case of transmission, with institute's favored area in speed changer and selected component feed lubricant oil.Transmission components is lubricated and cooled off to hydraulic system 10, uses on electro-mechanical transmission 17.Speed changer 17 has various transmission components (for example lubricating loop 16) and various torque drive mechanisms (for example, being called the clutch of C1 clutch here), and wherein oil circuit 16 can be in the position 18 receives fluids.The vehicle brake that hydraulic system 10 is returned shown in the position 20 provides cool stream.Also show C1 clutch and break on Fig. 1, as described below, by the operation of hydraulic system 10, scope and break control position 21 place's fluids can be sent to C1 clutch and break by optional route.Preferably, this fluid is the MIL-L-7808 fluid, and it has lower viscosity so that reduce rotational loss, and support from-52 degrees centigrade (℃) to the operation of 125 ℃ ambient temperatures.
The main pump assembly
With reference now to Fig. 2,, the hydraulic system 10 of Fig. 1 comprises the main pump assembly 36 of pipeline replaceable (line-replaceable).Main pump assembly 36 comprises electronic control module 37 and the electronic main pump 40 that is connected thereto.Particularly, electronic control module 37 and main pump 40 receive the power of high voltage direct current (DC) bus 49, as shown in Figure 3.Bus 49 is preferred with power source (for example diesel engine) transferring power of 610 volts of DC from connecting with generator and lithium cell.But, also can use the power source that can operate with along bus 49 transferring high voltage electric energy.
Preferably, motor 42 is can operate so that the variable speed electric motors, particularly that rotor 44 rotates with the speed from 2000 rev/mins (rpm) to maximum 8000rpm.Preferably, satisfy the hydraulic system stream needs of the various transmission components shown in Fig. 1 at 7000rpm (maximum pump speed 88%), to guarantee suitable design margin by providing above the capacity of design point 14%.Hydraulic system stream need be determined and sends to pump controller 38 by the control area net of vehicle shown in Fig. 3 network (CAN) bus 56 based on the information of vehicles of monitoring.Traction drive system (TDS) controller 57 uses algorithms with the speed according to the information of monitoring (for example, the temperature of one or more transmission components shown in the speed of the speed changer output element 22 of Fig. 1, Fig. 1, the flow needs of Fig. 1 mesohigh pump B level of flow needs that comprise C1 clutch and other torque-transmitting mechanisms and the hydrodynamic pressure that pump 40 provides) setting main pump 40.Therefore because pump speed is set at the needs of current system, so that with pump 40 is minimized with the relevant pumping loss of unnecessary high speed operation.Can fine understanding as those skilled in the art, on the output element 22 or on other relevant rotary component such as the driving belt 110 velocity transducer can be set, to determine the speed of output element 22.
Preferably, TDS controller 57 monitor vehicle information, and the CAN bus 56 by Fig. 3 sends instruction to pump controller 38, with the speed and the selected pump stage A-D of control pump shaft 44.Preferably, pump controller 38 also provides feedback for TDS controller 57 by CAN bus 56, detects with the prevention of supporting potential topic, thereby can change main pump assembly 36 before breaking down.
In addition, CAN bus 56 allows to use controlled starting in extremely low temperature (for example ,-51 ℃), to prevent causing too high current peak owing to the raising of fluid shearing viscosity.Be provided with the priming speed control algorithm in TDS, TDS sends activating signal by CAN bus 36 to pump controller 38.
When vehicle launch, provide activating signal 58 to pump controller 38, triggering controller 38, and the communicating by letter of beginning and TDS controller 57.Electronic control module 37 also comprises pump motor inverter 39.Preferably, pump motor inverter 39 is for being the three-phase power inverter that power turns round with 610 volts of DC providing by Fig. 3 bus 49.Circuit control device 41 control inverters 39, and be that power turns round with the low-voltage direct among Fig. 3 (LVDC) 51.
Preferably, pump motor inverter 39 is installed on the pump motor 42 by the integrated type cooling plate, and described cooling plate makes the speed changer cooling fluid circulation by interior oil path in this cooling plate, to take away heat from power inverter 39 and controller 38.Whole main pump assembly 36 is designed to the replaceable unit of pipeline.When pump shaft 44 was installed, it was vertically directed, has improved the ability of quick dismounting and displacement.Preferably, as understood by those skilled in the art, high voltage bus 49 comprises high voltage interlocking (vo1tage interlock) so that cut off 610 volts power supply when removing connector in maintenance or during safeguarding.
The hydraulic system operation
With reference now to Fig. 1,, shows four levels of main pump 40: cooling class A, high pressure stage B, the first backflow level C and second a backflow level D.Suppose to use HVDC electric power, the main pump among Fig. 2 40 can be operated so that each in these grades to be provided so.Cooling class A provides maximum cool stream, and is designed to provide the fluid stream of 90 liters/minute (1pm).Cooling class A is provided by the impeller 46 of Fig. 2, and is low pressure high flow capacity level be used for circulating fluid for transmission, cooling and lubricated purpose.Cooling class A is from storage tank 34 sucking-off fluids, and provide fluid through first safety check 62, along runner 64, by runner 66, by filter 68, along runner 70 to cooler 72, again along runner 74 to restriction 76A, 76B and 76C, to cool off respectively and lubricated drive motor 12, steer motor 14 and oil circuit 16.In addition, runner 78 leads to runner 80, allows cooling class stream so that supercharging high-pressure level B further describes as following.
Under the authorized pressure in cooler 72 and the situation of temperature conditions, particularly, when oily temperature is lower than predeterminated level, when perhaps the cooler pressure drop was higher than predeterminated level, cooler bypass valve 82 allowed fluids to walk around cooler 72 to runner 74 from runner 70.Similarly, under the predetermined pressure drop situation, filter bypass valve 84 permission fluids directly to runner 70, are walked around runner 66 and filter 68 from runner 64.Sensor 86 provides the alarm that filter bypass will take place.If the pressure in the runner 64 has surpassed predeterminated level, pressure relief valve 67 is directed to storage tank 34 by tap hole 69 with excessive fluid so.
The high pressure stage B of the main pump 40 of Fig. 2 can operate that (for example, fluid 30lpm) so that in 21 place's application area and braking control, promptly engages selected clutch and break by TDS controller 57 controls of Fig. 3 so that the high pressure low discharge to be provided.In high pressure stage, the further supercharging of the fluid in the runner 80, and by the scope and braking control of second safety check 88 to runner 90 and 21 places.Main inlet control valve 92 is configured to the excess fluid in the runner 90 is discharged in the runner 80.All excess pressure streams of being discharged by pressure regulator valve 92 in the runner 90 all are recycled to pump intake 52C by runner 80.
The main pump 40 of Fig. 2 also provides the first backflow level C and second a backflow level D, respectively as shown in fig. 1.First refluxes level C from first out-put container, 30 removal fluids, and it is back to the storage tank 34 of central container 35.Therefore, fluid flows out from first out-put container 30, is pumped to storage tank 34 along runner 96.Similarly, second refluxes level D from second out-put container, 32 removal fluids, and it is pumped to storage tank 34 along runner 96, and wherein runner 96 also links to each other with the reflux pump exhaust port.The backflow of out- put container 30,32 has reduced the resistance that the rotary component (for example gear and break) in these zones causes, and has improved the total efficiency of vehicle 11.
The hydraulic system redundancy
Therefore, the main pump 40 of Fig. 2 has satisfied clutch application, brake application, cooling and the lubricated needs (following rear pump 100 provides the break cooling simultaneously) of the vehicle 11 of Fig. 1.But when main pump 40 broke down, when perhaps 610 volts DC bus 49 emergent powers lost, hydraulic system comprised redundant pumping system, and this redundancy pumping system comprises service pump 98 and rear pump 100.Service pump 98 is taken over and the continuation effect when main pump 40 breaks down, and it is by the fluid of battery 102 power supplies with conveying 4lpm.Therefore, pump 98 is by filling the C1 clutch along fluid course 104 transmission fluids and at 18 places.Therefore, the C1 clutch can rotate output element 22 by the mechanical connection (for example axle and gear) that is connected thereto, as understood by those skilled in the art.Pressure relief valve 106 is connected with runner 104 fluids, and this safety valve 106 is discharged to storage tank 34 by opening tap hole 108 with excessive hydrodynamic pressure.Preferably, pressure relief valve 106 is opened at the pressure of 2000kPa.
In case C1 clutch, 18 make the output element 22 can powered vehicle in the position, make when vehicle reaches the speed of the stream that allows mechanical driven rear pump 100 to produce to allow full-automatic action and pressure, as described below, so just pass through the signal at stop service pump 98 of the TDS controller 57 of Fig. 3.TDS controller 57 is battery-operated, rather than is driven by 610 volts DC bus 49, thereby still can play a role when 610 volts power supply breaks down.
Rear pump safety check 134 is corresponding to the stress level in runner 91 and 128, and cause when in runner 128, producing pressure in the position of break coolant valve 112 and rear pump bypass valve 122, for example, when activating rear pump bypass valve 122 because the pressure in the runner 91 is too low, so break coolant valve 112 is closed and rear pump bypass valve 122 when not discharging fluids by tap hole 124, rear pump safety check 134 is opened to allow fluid to supply to runner 91 from rear pump 100.
In addition, when main pump 40 inoperative, and when the pressure in the runner 128 is higher than pressure in the runner 66, rear pump 100 outputs are up to the fluid of 75 1pm, it is along runner 128, by safety check 130, restriction 132, by filter 68 and cooler 72, reach drive motor 12, steer motor 14 and lubricating loop 16, to keep function.In addition, the pressure in the lubricant pressure sensor 77 sensing runners 74, and this information sent it back electronic controller 38 makes the required adjusting that can begin fluid stream.Under normal operation (that is, when brake application device not), lube regulator valve 79 makes too much lubricant oil flow back to storage tank 34 by valve 122.
Referring to figs. 1 to the description described in 3, provide the method for fluid to comprise for the transmission components of electro-mechanical transmission: (promptly to first pump, main pump 40) transmits electric power (promptly, by bus 49), the first pump may command (by TDS controller 57 and electronic controller 38) is to provide fluid to transmission components selectively, for example the torque-transmitting mechanisms of locating in scope and braking control (position 21), in the position C1 clutch and other transmission components at 18 places, for example drive motor 12, steer motor 14 and comprise speed changer lubricating loop 16.But if can not use along the electric power of bus 49, perhaps main pump 40 is because other reason can't turn round, this method comprises to second pump (promptly so, service pump 98) carry the battery can (that is), with to 18 torque-transmitting mechanisms C1 clutch provides fluid in the position from battery 102.This fluid has engaged the C1 clutch, and speed changer output element 22 can be rotated.Thereby by the 3rd pump, promptly the break at 20 places provides fluid to the rear pump 100 that drives by speed changer output element 22 to the scope at 21 places in the position and braking control, drive motor 12, lubricating loop 16, steer motor 14 with in the position.In addition, this method can comprise when the rotation of output element 22 reaches predetermined speed, stops the power of battery (that is the power of battery 102) to service pump 98.In this speed, rear pump 100 is enough to system's fluid power of keeping whole.
Realize optimal mode of the present invention although described in detail, those skilled in the art in the invention will be appreciated that, realize various optional design of the present invention and mode of execution within the scope of the appended claims.
Claims (13)
1. hydraulic system that is used for electro-mechanical transmission comprises:
Electronic main pump can be operated to provide fluid to the transmission components that comprises torque-transmitting mechanisms;
Battery-driven service pump, when the electric power of supplying with described main pump can't use, described battery-operated service pump can be operated selectively, engages described torque-transmitting mechanisms so that enough hydrodynamic pressures to be provided, thereby the speed changer output element can be rotated; With
Rear pump, it can be driven by the rotating machinery ground of described speed changer output element, provides fluid to substitute described main pump to described transmission components.
2. hydraulic system as claimed in claim 1 also comprises:
Storage tank;
Wherein said transmission components comprises first and second out-put containers;
Wherein said main pump has the structure that forms a plurality of runners, and described a plurality of runner may command are to provide:
Cooling class, wherein the hydrodynamic pressure that is provided by described main pump is characterized as the first flow and first pressure;
High pressure stage, wherein the hydrodynamic pressure that is provided by described main pump is characterized as less than second flow of described first flow with greater than second pressure of described first pressure;
The first backflow level, the fluid of wherein said first out-put container is back to described storage tank; And
The second backflow level, the fluid of wherein said second out-put container is back to described storage tank.
3. hydraulic system as claimed in claim 2 also comprises:
At least one safety check, it can be operated allowing and be communicated with fluid between the described transmission components at main pump described in one of described cooling class and described high pressure stage, and prevents this fluid connection when the electric power of the described main pump of supply can't use.
4. hydraulic system as claimed in claim 2 also comprises:
Pressure equalizing valve, when the electric power of supplying with described main pump can't use, described pressure equalizing valve can be operated allowing one of described first and second out-put containers to be communicated with fluid between the described storage tank, thereby described pressure equalizing valve replaces described first and second described each that reflux level to play a role.
5. hydraulic system as claimed in claim 1, wherein said transmission components comprises break, and comprises:
The break coolant valve, when using described break, described break coolant valve can be operated, and is communicated with fluid between the described break to allow described rear pump, so that cool off described break.
6. hydraulic system as claimed in claim 5 also comprises:
The rear pump bypass valve;
Storage tank;
Wherein, when not using described break, described rear pump bypass valve can be operated, so that allow fluid to flow to described storage tank when hydrodynamic pressure surpasses predetermined pressure.
7. hydraulic system as claimed in claim 1, wherein said service pump is selectively controlled, and hydrodynamic pressure is provided to provide when reaching predetermined rotational speed with the described output element of box lunch; And
Wherein when described output element rotates with the rotational speed that is not less than described predetermined rotational speed, provide hydrodynamic pressure to described transmission components by described rear pump.
8. hydraulic system as claimed in claim 1, wherein said main pump have rotatable so that the pump shaft of hydrodynamic pressure to be provided, and comprise:
The motor-drive pump controller, it is operably connected to described main pump, and be configured to control described pump shaft so that the speed rotation that small part ground is determined based on system's operating conditions, wherein said system operating conditions comprises that following condition one of at least: the speed of described output element, the temperature of one or more described transmission components, predetermined amount of flow needs and hydrodynamic pressure.
9. hydraulic system as claimed in claim 1, wherein said speed changer is suitable for the driving track vehicle; And
Wherein said output element is operably connected on the crawler belt of endless-track vehicle, makes that described output element rotates when described crawler belt rotates between period of traction, thereby when the described vehicle of traction, described rear pump can be operated to provide fluid to described transmission components.
10. hydraulic system that is used for electro-mechanical transmission comprises:
Electronic main pump can be operated to provide fluid to the transmission components that comprises torque-transmitting mechanisms, and wherein said main pump has rotatable so that the pump shaft of hydrodynamic pressure to be provided;
Battery-driven service pump, when the electric power of supplying with described main pump can't use, described battery-driven service pump can be operated selectively, engages described torque-transmitting mechanisms so that enough hydrodynamic pressures to be provided, thereby the speed changer output element can be rotated;
Rear pump, its rotating machinery ground by described speed changer output drives, and provides fluid to substitute described main pump to described transmission components; With
The motor-drive pump controller, it is operably connected to described main pump, and be configured to control described pump shaft so that the speed rotation that small part ground is determined based on system's operating conditions, wherein said system operating conditions comprises that following condition one of at least: the speed of described output element, the temperature of one or more described transmission components, the predetermined amount of flow of described torque-transmitting mechanisms needs and hydrodynamic pressure.
11. hydraulic system as claimed in claim 10 also comprises:
Storage tank;
The rear pump bypass valve, when not using described break, described rear pump bypass valve can be operated, so that allow fluid to flow to described storage tank when hydrodynamic pressure surpasses predetermined pressure.
12. one kind provides the method for fluid to the transmission components that comprises torque-transmitting mechanisms, comprising:
If electric power can be used, provide FLUID TRANSPORTATION electric power to first pump so, the described first pump may command is to provide fluid to the described transmission components that comprises described torque-transmitting mechanisms;
If described electric power is unavailable, perhaps described first pump can't turn round, carry the power of battery to second pump so, make described second pump provide fluid to described torque-transmitting mechanisms, thereby engage described torque-transmitting mechanisms, the speed changer output element can be rotated, and the output element of wherein said rotation mechanically drives the 3rd pump, to provide fluid to described transmission components.
13. method as claimed in claim 12 also comprises:
When the rotation of described output element be characterized as predetermined speed the time, stop carrying the power of battery to described second pump.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/459248 | 2006-07-21 | ||
| US11/459,248 | 2006-07-21 | ||
| US11/459,248 US7543695B2 (en) | 2006-07-21 | 2006-07-21 | Hydraulic system for an electro-mechanical transmission and method of providing fluid to transmission components |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101109442A true CN101109442A (en) | 2008-01-23 |
| CN101109442B CN101109442B (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101369530A Expired - Fee Related CN101109442B (en) | 2006-07-21 | 2007-07-23 | Hydraulic system for an electro-mechanical transmission and method of providing fluid to transmission components |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7543695B2 (en) |
| CN (1) | CN101109442B (en) |
| DE (1) | DE102007033477B4 (en) |
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| WO2010050855A1 (en) * | 2008-10-30 | 2010-05-06 | Volvo Lastvagnar Ab | Method and device for securing lubrication of a automated manual transmission in a vehicle |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101109442B (en) | 2012-07-11 |
| US20080017472A1 (en) | 2008-01-24 |
| DE102007033477B4 (en) | 2019-09-26 |
| DE102007033477A1 (en) | 2008-02-07 |
| US7543695B2 (en) | 2009-06-09 |
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